# A061556 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 5 4 9 5 14 6 23 7 43 8 79 9 149 10 263 11 461 12 823 13 1451 14 2549 15 4483 16 7879 17 13859 18 24247 19 42683 20 75037 21 131707 22 230773 23 405401 24 710569 25 1246379 26 2185021 27 3831913 28 6720059 29 11781551 30 20657677